We need developers who can develop SIP client library for iPhone 3.x, iPhone 4.x, Android 2.x , BB OS 5.x, BB OS 6.x, J2ME, Windows Phone 6.5 and Windows Phone7.
The SIP client will connect with Asterisk.
We need source codes too.
PS : You can propose SIP client library only one or every platform.
Please apply if you have proven experience working with SIP client on mobile devices. Otherwise, please do not waste your time and our time.